I'll be the bad guy and say I DON'T agree with the original post. I do in principal but not in pratice. Its a little too black and white... sounds very PETA-esque. I keep several species that are wild caught and are not currently bred in captivity. And I don't feel bad about it. Now, I would NOT buy something wild caught that I knew was either endangered or regulated (CITES listed)... like FRT which are poached.
What we really need is to develop something like they are doing with SaltWater. Like the MARINE AQUARIUM COUNCIL (MAC)... they have studied the effect of harvesting, the methods, etc, and worked hard to come up with SUSTAINABLE practices and then worked to get those practices implemented at the collecting level... working with the local fisherman. Trying to change the way collection takes place while still enabling the porr collector in Third World country X to make a living and support his family.
There seems to be NO freshwater equivalent. Partly because many many of the fish most common in the pet trade are bred in captivity. But, we have to face the facts that many of the oddballs are not... and there needs to be a concerted effort to manage the wild populations and create a system for sustainable harvesting... wether that harvesting is for food for the local community or for the pet trade.
But perhaps, the fact is that its not necessary because only a few of the "oddballs" really are wild caught, and not in large numbers... so there is not a huge effect? ANd the high-volume fish are all raised on farms (even Widebar Dats are farm raised and only farmed ones are allowed to be exported from Thailand... wild ones cannot be exported). But, my thought is, we might assume this, but has the research really been done? We need to know this... not assume this, and unfortunately, there is not an organized effort out there in the FW hobby to address this issue, as there has been in the SW hobby...
saying "don't buy wild caught fish" is far too simplistic.
Stepping off the soapbox now...